3-6mm 4-8mm Expanded Perlite for Hydroponics System

Perlite is a raw material which, in its natural state, is a glassy volcanic rock containing a percentage of water.

During a process called "Expansion", Perlite is rapidly heated and expands up to twenty times its original size, due to the evaporation of the moisture from within.

Expanded Perlite is a lightweight, air entraining material, which is both absorbent and acts as a filter aid. It is sterile and both environmentally friendly and chemically neutral. 

Typical analysis of Expanded perlite

70-75% silicon dioxide: SiO2
12-16% aluminum oxide: Al2O3
2.5-4.0% sodium oxide: Na2O
1.0-3.0% potassium oxide: K2O
0.15-1.5% iron oxide: Fe2O3
0.2-0.5% magnesium oxide: MgO
0.3-1.8% calcium oxide: CaO
4-8% loss on ignition (chemical / combined water)

Why perlite has become so popular in the horticulture industry?

Expanded Perlite has a neutral pH of 6.5-7.5, which is perfect for hydroponic systems
Expanded Perlite Holds moisture but has an excellent drainage capacity
Expanded Perlite’s relatively large particle size allows for optimum oxygen exchange.
Expanded Perlite is extremely lightweight, making it very user-friendly. It is important to prevent injury in any way possible, and reducing unnecessary lifting is an obvious place to start.
Expanded Perlite is completely inert, meaning that it does not provide any nutrition for plants.
Expanded Perlite is free of pests, weeds, and disease, which means your plants will be healthier from the time it is planted.

2-4mm, 3-6mm, 4-8mm Expanded Vermiculite for horticulture, agriculture, insulation